{% extends "base.html" %}
{% import "macros/ui.html" as ui %}

{% block title %}{{ product.name }}{% endblock title %}

{% block content %}
<div class="grid gap-10 lg:grid-cols-2">
  <!-- gallery — prev/next arrows + opacity transitions adapted from
       penguinui/carousel/default-carousel.html; kept our product thumbnail strip
       (more useful than carousel dots for a product) and 0-based `active` -->
  <div x-data="{ active: 0, count: {{ images | length }},
         prev() { this.active = this.active > 0 ? this.active - 1 : this.count - 1 },
         next() { this.active = this.active < this.count - 1 ? this.active + 1 : 0 } }"
       class="space-y-4">
    <div class="relative aspect-square overflow-hidden rounded-radius border border-outline bg-surface-alt dark:border-outline-dark dark:bg-surface-dark-alt">
      {% if images | length > 0 %}
      {% for image in images %}
      <img x-show="active === {{ loop.index0 }}" x-transition.opacity.duration.300ms src="/images/{{ image }}" alt="{{ product.name }}" class="absolute inset-0 size-full object-cover">
      {% endfor %}
      {% endif %}
      {% if images | length > 1 %}
      <!-- previous slide -->
      <button type="button" @click="prev()" aria-label="{{ t(key='gallery-prev', lang=lang | default(value='sk')) }}"
        class="absolute left-3 top-1/2 z-10 flex -translate-y-1/2 items-center justify-center rounded-full bg-surface/40 p-2 text-on-surface transition hover:bg-surface/60 focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-primary dark:bg-surface-dark/40 dark:text-on-surface-dark dark:hover:bg-surface-dark/60 dark:focus-visible:outline-primary-dark">
        <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke="currentColor" fill="none" stroke-width="3" class="size-5" aria-hidden="true">
          <path stroke-linecap="round" stroke-linejoin="round" d="M15.75 19.5 8.25 12l7.5-7.5" />
        </svg>
      </button>
      <!-- next slide -->
      <button type="button" @click="next()" aria-label="{{ t(key='gallery-next', lang=lang | default(value='sk')) }}"
        class="absolute right-3 top-1/2 z-10 flex -translate-y-1/2 items-center justify-center rounded-full bg-surface/40 p-2 text-on-surface transition hover:bg-surface/60 focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-primary dark:bg-surface-dark/40 dark:text-on-surface-dark dark:hover:bg-surface-dark/60 dark:focus-visible:outline-primary-dark">
        <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke="currentColor" fill="none" stroke-width="3" class="size-5" aria-hidden="true">
          <path stroke-linecap="round" stroke-linejoin="round" d="M8.25 4.5l7.5 7.5-7.5 7.5" />
        </svg>
      </button>
      {% endif %}
    </div>
    {% if images | length > 1 %}
    <div class="flex flex-wrap gap-2">
      {% for image in images %}
      <button type="button" @click="active = {{ loop.index0 }}"
        :class="active === {{ loop.index0 }} ? 'border-primary dark:border-primary-dark' : 'border-outline dark:border-outline-dark'"
        class="size-16 overflow-hidden rounded-radius border">
        <img src="/images/{{ image }}" alt="" class="size-full object-cover">
      </button>
      {% endfor %}
    </div>
    {% endif %}
  </div>

  <!-- details -->
  {% set fld = "w-full rounded-radius border border-outline bg-surface-alt px-3 py-2 text-sm text-on-surface focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-primary dark:border-outline-dark dark:bg-surface-dark-alt/50 dark:text-on-surface-dark dark:focus-visible:outline-primary-dark" %}
  {% set btn = "inline-flex items-center justify-center gap-2 whitespace-nowrap rounded-radius px-5 py-2 text-sm text-center font-medium tracking-wide transition hover:opacity-75 focus-visible:outline-2 focus-visible:outline-offset-2 active:opacity-100 active:outline-offset-0 disabled:cursor-not-allowed disabled:opacity-75 border border-primary bg-primary text-on-primary focus-visible:outline-primary dark:border-primary-dark dark:bg-primary-dark dark:text-on-primary-dark dark:focus-visible:outline-primary-dark" %}
  <script id="variant-data" type="application/json">{{ variants | json_encode() | safe }}</script>
  <div class="space-y-6" x-data="productBuy(JSON.parse(document.getElementById('variant-data').textContent))">
    {% if category %}
    <a href="/category/{{ category.slug }}" class="text-sm font-medium text-primary dark:text-primary-dark">{{ category.name }}</a>
    {% endif %}
    <h1 class="text-3xl font-bold text-on-surface-strong dark:text-on-surface-dark-strong">{{ product.name }}</h1>

    <template x-if="current">
      <div class="space-y-6">
        <!-- option picker (only when there's a real choice); first option is
             selected by default and switching it updates the price + buy form -->
        <template x-if="variants.length > 1">
          <div class="max-w-sm space-y-1.5">
            <label for="variant-select" class="text-sm font-medium text-on-surface-strong dark:text-on-surface-dark-strong">{{ t(key="choose-option", lang=lang | default(value='sk')) }}</label>
            <select id="variant-select" x-model.number="sel" class="{{ fld }}">
              <template x-for="(v, i) in variants" :key="v.id">
                <option :value="i" x-text="(v.label || '—') + ' · ' + v.price + ' {{ product.currency }}' + (v.in_stock ? '' : ' ({{ t(key='out-of-stock', lang=lang | default(value='sk')) }})')"></option>
              </template>
            </select>
          </div>
        </template>

        <div class="flex items-baseline gap-3">
          <p class="text-2xl font-semibold" :class="current.on_sale ? 'text-danger' : 'text-primary dark:text-primary-dark'">
            <span x-text="current.price"></span> {{ product.currency }}
          </p>
          <template x-if="current.on_sale">
            <p class="text-lg text-on-surface/50 line-through dark:text-on-surface-dark/50"><span x-text="current.regular_price"></span> {{ product.currency }}</p>
          </template>
        </div>

        {% if product.description %}
        <div class="whitespace-pre-line leading-relaxed text-on-surface/80 dark:text-on-surface-dark/80">{{ product.description }}</div>
        {% endif %}

        <template x-if="current.in_stock">
          <div class="space-y-2">
            <form method="post" action="/cart/add" hx-post="/cart/add" hx-swap="none" class="flex flex-wrap items-end gap-3"
              hx-on::after-request="if (event.detail.successful) toast('{{ t(key='cart-added', lang=lang | default(value='sk')) }}')">
              {{ ui::csrf_field() }}
              <input type="hidden" name="variant_id" :value="current.id">
              <div class="space-y-1.5">
                <label for="quantity" class="text-sm font-medium text-on-surface-strong dark:text-on-surface-dark-strong">{{ t(key="quantity", lang=lang | default(value='sk')) }}</label>
                <input type="number" id="quantity" name="quantity" value="1" min="1" :max="current.stock" class="{{ fld }} w-24">
              </div>
              <button type="submit" class="{{ btn }}">{{ t(key="add-to-cart", lang=lang | default(value='sk')) }}</button>
            </form>
            <p class="text-sm text-on-surface/60 dark:text-on-surface-dark/60">{{ t(key="in-stock", lang=lang | default(value='sk')) }}: <span x-text="current.stock"></span></p>
          </div>
        </template>
        <template x-if="!current.in_stock">
          <p class="inline-flex rounded-radius bg-danger/10 px-3 py-2 text-sm font-medium text-danger">{{ t(key="out-of-stock", lang=lang | default(value='sk')) }}</p>
        </template>
      </div>
    </template>

    <template x-if="!current">
      <p class="inline-flex rounded-radius bg-danger/10 px-3 py-2 text-sm font-medium text-danger">{{ t(key="out-of-stock", lang=lang | default(value='sk')) }}</p>
    </template>
  </div>

  <script>
    function productBuy(variants) {
      return {
        variants: variants || [],
        // Default to the first in-stock variant, else the first.
        sel: Math.max(0, (variants || []).findIndex(v => v.in_stock)),
        get current() { return this.variants[this.sel] || null; },
      };
    }
  </script>
</div>
{% endblock content %}